ci: run v doc with VJOBS=1 on the CI, to make remote diagnosing of failures easier

Author: spytheman

.github/workflows/docs_ci.yml

@@ -80,4 +80,4 @@ jobs:
       - name: Build V
         run: make
       - name: Check examples in the doc comments for all vlib modules
-        run: ./v doc -check-examples -f none vlib/
+        run: VJOBS=1 ./v doc -check-examples -f none vlib/

.github/workflows/module_docs_ci.yml

@@ -49,7 +49,7 @@ jobs:
       - name: Test v doc
         run: ./v test cmd/tools/vdoc/
       - name: Build module documentation and check the examples in the comments
-        run: ./v doc -m -f html -unsafe-run-examples -time vlib/
+        run: VJOBS=1 ./v doc -m -f html -unsafe-run-examples -time vlib/
       - name: Deploy docs to vercel
         if: github.event_name == 'push' && github.repository == 'vlang/v' && github.ref == 'refs/heads/master'
         run: npx vercel --confirm --prod --name vmodules --token ${{ secrets.VERCEL_TOKEN }} vlib/_docs/ || true